Flexured sun gears for planetary gear systems. In embodiments, a sun gear includes a spline section configured to couple the sun gear to another component, a gear section configured to mesh with at least one other gear of the planetary gear system, and a flexure section configured to couple the spline section to the gear section. The flexure section of the sun gear may have a flexure wall and a flexure curve, and has a thickness (e.g., in at least a portion of the flexure section) that is smaller than a thickness of the spline section and/or the gear section. The flexure section may enable the gear section to displace or move radially with respect to the spline section in response to a rotational force. For example, the flexure section may not move axially (e.g., may not extend) but may bend and/or rotate in response to the rotational force.

Coupling of geophysical sensor cable sections. At least some of the example embodiments are methods including coupling a first geophysical sensor cable section to a second geophysical sensor cable section. The coupling may be by: telescoping a first connector of the first geophysical sensor cable section into a second connector, the first connector comprising a male connector portion with external threads, and the second connector comprising a coupling ring with internal threads; abutting a first portion of a clam-shell gear against the coupling ring; closing the clam-shell gear such that a second portion of the clam-shell gear abuts the coupling ring, the clam-shell gear defining gear teeth on an outside diameter of the clam-shell gear; mating a pinion gear to the clam-shell gear; and turning the coupling ring relative to the male connector portion using of the pinion gear turning the clam-shell gear.

Coupling of geophysical sensor cable sections. At least some of the example embodiments are methods including coupling a first geophysical sensor cable section to a second geophysical sensor cable section. The coupling may be by: telescoping a first connector of the first geophysical sensor cable section into a second connector, the first connector comprising a male connector portion with external threads, and the second connector comprising a coupling ring with internal threads; abutting a first portion of a clam-shell gear against the coupling ring; closing the clam-shell gear such that a second portion of the clam-shell gear abuts the coupling ring, the clam-shell gear defining gear teeth on an outside diameter of the clam-shell gear; mating a pinion gear to the clam-shell gear; and turning the coupling ring relative to the male connector portion using of the pinion gear turning the clam-shell gear.

Coupling of geophysical sensor cable sections. At least some of the example embodiments are methods including coupling a first geophysical sensor cable section to a second geophysical sensor cable section. The coupling may be by: telescoping a first connector of the first geophysical sensor cable section into a second connector, the first connector comprising a male connector portion with external threads, and the second connector comprising a coupling ring with internal threads; abutting a first portion of a clam-shell gear against the coupling ring; closing the clam-shell gear such that a second portion of the clam-shell gear abuts the coupling ring, the clam-shell gear defining gear teeth on an outside diameter of the clam-shell gear; mating a pinion gear to the clam-shell gear; and turning the coupling ring relative to the male connector portion using of the pinion gear turning the clam-shell gear.

Coupling of geophysical sensor cable sections. At least some of the example embodiments are methods including coupling a first geophysical sensor cable section to a second geophysical sensor cable section. The coupling may be by: telescoping a first connector of the first geophysical sensor cable section into a second connector, the first connector comprising a male connector portion with external threads, and the second connector comprising a coupling ring with internal threads; abutting a first portion of a clam-shell gear against the coupling ring; closing the clam-shell gear such that a second portion of the clam-shell gear abuts the coupling ring, the clam-shell gear defining gear teeth on an outside diameter of the clam-shell gear; mating a pinion gear to the clam-shell gear; and turning the coupling ring relative to the male connector portion using of the pinion gear turning the clam-shell gear.

Method for generating a tooth space profile (5) between two teeth (4) of a wheel (1) engaging with a roller (3) pinion (2) in a reference plane perpendicular to a central axis (X1) whose intersection with the reference plane defines a centre (C), comprising the step of defining a nominal tooth space with symmetrical first and second profiles so that the space is suitable for receiving a roller which comes into contact, without clearance, with the facing active portions of the first and second profiles at the level of a primitive diameter. The method of the invention comprises the steps of deforming the bottom portion (12) of the first profile so that the bottom point is brought nearer to the centre by an amount equal to a given radial clearance, and moving the first profile angularly through a given angular half-clearance around the centre to shift it away from the radial axis.

A drive system for an aircraft landing gear, the drive system including a pinion gear, a drive shaft arranged to rotate the pinion gear about a drive axis, a driven gear arranged to mesh with the pinion gear to be rotatable by the pinion gear, the driven gear being connectable to a wheel of the landing gear to be capable of rotating the wheel about a wheel axis; and a flexible interface. The flexible interface includes a plurality of driven gear coupling members, each driven gear coupling member having a first connection portion attached to the driven gear, a second connection portion adapted to be attached to the wheel at an offset distance from the wheel axis, and a joint between the first connection portion and the second connection portion, the joint permitting relative movement between the first connection portion and the second connection portion.

A drive system for an aircraft landing gear, the drive system including a pinion gear, a drive shaft arranged to rotate the pinion gear about a drive axis, a driven gear arranged to mesh with the pinion gear to be rotatable by the pinion gear, the driven gear being connectable to a wheel of the landing gear to be capable of rotating the wheel about a wheel axis; and a flexible interface. The flexible interface includes a plurality of driven gear coupling members, each driven gear coupling member having a first connection portion attached to the driven gear, a second connection portion adapted to be attached to the wheel at an offset distance from the wheel axis, and a joint between the first connection portion and the second connection portion, the joint permitting relative movement between the first connection portion and the second connection portion.

A linear drive apparatus is provided. The linear drive apparatus may include an outer tube, a sealing end cap provided at the end of the outer tube, a screw provided in the outer tube, a drive nut provided on the screw in a threaded fit, an extension rod provided between the outer tube and the screw, a sealing assembly provided between the extension rod and the sealing end cap, and a waterproof and oil-proof ventilation stopper provided on the outer tube. One end of the screw may be connected to a drive mechanism. One end of the extension rod may be connected to the drive nut. The other end of the extension rod may pass through the sealing end cap.

The present invention relates to a gearbox for a wind turbine comprising: an input shaft portion adapted to be operatively connected to a wind turbine rotor shaft; and input hear wheel having teeth arranged around an outer or inner circumference of the wheel, and being attached to the input shaft portion such as to rotate with the input portion; one or more pinions including a pinion wheel arranged on a pinion shaft, the pinion wheel having teeth arranged to engage with the teeth of the input gear wheel, and the pinion shaft being rotatably mounted in a pinion support structure, wherein the input shaft portion is rotatably mounted with respect to the pinion support structure.